11. 多数科学家宁可默默无闻，也不愿参加各种与自己专业无关的会议。(rather...than)
Most scientists would rather remain unknown than go to various meetings that have nothing to do with their own majors.
12. 看着这两个朋友分开，我不禁想到“天下没有不散的筵席。” 这句谚语。
Seeing the two friends part with each other, I can’t help thinking of a proverb “The best of friends must part.”
※ The best of friends must part. = The longest day has an end.
13. 中国加入世贸组织后，我们的经济必将蒸蒸日上。(better and better)
After China’s entry into WTO, our economy will certainly get better and better every day.
14. 依我所见，经常出尔反尔的人，不值得信任。(break one’s promise)
In my opinion, those who often break their promises are not worth trusting.
15. 实行医疗改革后，参加体育锻炼的人与日俱增。(increase)
After the medical reform, the number of those who take part in the physical trainingis increasing every day.
16. 青年人不应该回避困难，相反，应该千方百计克服它们。(on the contrary)
Young people should not avoid difficulties. On the contrary, they should try their best to overcome them.
17. 如果你不打算努力工作，你将一无所获。(effort)
If you are not prepared to make great efforts, you will achieve nothing.
18. 承蒙你慷慨相助，我的感激之情难以言表。(appreciate)
It was generous of you to help me, and I appreciate it more than I can say.
19. 发现学生在下午昏昏欲睡的样子，老师竭尽所能来激发他们的兴趣。(arouse)
Finding students sleepy in the afternoon, the teacher did everything he could to arouse their interest.
20. 父母们应该鼓励他们的孩子多参加室外运动，和大自然接触，使周末更多姿多彩。(encourage)
Parents should encourage their children to do outdoor sports, to be close to nature and to make their weekends more colorful.